Table of Contents
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CONNECTING THE 4300C VIA RS232 INTERFACE ......................................................................... 6-15
INPUT AND OUTPUT QUEUE ........................................................................................................ 6-17
COMMANDS AND SYNTAX .......................................................................................................... 6-17
DETAILS OF COMMAND REFERENCE ........................................................................................... 6-18
COMMAND INDEX ....................................................................................................................... 6-18
G
CHAPTER 7 THEORY OF OPERATIONS .................................................................................................................. 7-1
CHAPTER 8 ROUTINE MAINTENANCE .................................................................................................................. 8-1
Test Current Range ....................................................................................................... 6-11
SRQ's and Serial Polls .................................................................................................... 6-11
Output Data Terminator ............................................................................................... 6-12
Test Current Control ...................................................................................................... 6-12
Display Hold .................................................................................................................. 6-12
Temperature Compensation ......................................................................................... 6-12
Configuration Status Query .......................................................................................... 6-13
.......................................................................................................................... 6-15
The RS232 interface capabilities: .................................................................................. 6-15
Notes for RS232 installation ......................................................................................... 6-15
Connecting to a Computer ............................................................................................ 6-16
Checking Connections ................................................................................................... 6-16
RS232 message terminators ......................................................................................... 6-17
Entering Commands ...................................................................................................... 6-17
Command Characters ................................................................................................... 6-17
Combining Commands .................................................................................................. 6-17
Synopsis of Commands ................................................................................................. 6-17
............................................................................................................................... 6-35
........................................................................................................................................ 6-35
.................................................................................................................... 6-35
Data .............................................................................................................................. 6-35
Ranges .......................................................................................................................... 6-36
Overload - Pin 12 .......................................................................................................... 6-36
Pin assignment .............................................................................................................. 6-36
.................................................................................................................... 7-1
...................................................................................................... 7-2
C
.......................................................................................................... 7-5
IRCUIT
Current Source ................................................................................................................ 7-5
Reference ....................................................................................................................... 7-5
Error Amplifier ................................................................................................................ 7-5
Output Stage ................................................................................................................... 7-6
Range Switching.............................................................................................................. 7-6
Protection Circuitry......................................................................................................... 7-6
Power Supply .................................................................................................................. 7-6
Charging Inductor Mode ................................................................................................. 7-6
Micro-Controller Board ................................................................................................... 7-7
Micro-Controller ............................................................................................................. 7-7
Over-Voltage Protection ................................................................................................. 7-7
TCM ................................................................................................................................ 7-7
2.5V Reference ............................................................................................................... 7-8
RS-232/Display Switch and RS 232 Driver/Receiver ....................................................... 7-8
............................................................................................................................ 7-8
Localizing the Problem .................................................................................................... 7-8
Component Replacement ................................................................................................ 7-9
.......................................................................................................................................... 8-1
................................................................................................................ 8-1
............................................................................................................. 8-1
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